【Android - 进阶】之Dialog分类及使用

1、确定取消对话框

代码：

// 使用AlertDialog.Builder初始化对话框
AlertDialog.Builder builder0 = new AlertDialog.Builder(context);
// 设置图标
builder0.setIcon(R.mipmap.ic_launcher);
// 设置标题
builder0.setTitle("确定取消对话框");
// 设置显示内容
builder0.setMessage("点击确定还是取消？");
// 确定按钮
builder0.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(context, "您点击了确定！", Toast.LENGTH_SHORT).show();
    }
});
// 中立按钮（常用作忽略）
builder0.setNeutralButton("忽略", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(context, "您选择了忽略！", Toast.LENGTH_SHORT).show();
    }
});
// 取消按钮
builder0.setNegativeButton("取消", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(context, "您点击了取消！", Toast.LENGTH_SHORT).show();
    }
});
// 创建对话框并展示
builder0.create().show();

效果：

2、列表对话框

代码：

final String[] items = {"苹果", "桃子", "梨", "李子", "香蕉", "橘子"};
AlertDialog.Builder builder1 = new AlertDialog.Builder(context);
builder1.setIcon(R.mipmap.ic_launcher);
builder1.setTitle("选择你喜欢的水果");
// 注意：如果是列表形式的对话框，就不能有message
// 设置列表并绑定点击事件
builder1.setItems(items, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(context, "你最喜欢的水果是" + items[which] + "！", Toast.LENGTH_SHORT).show();
    }
});
builder1.create().show();

效果：

3、条形进度条对话框

代码：

private boolean isThreadInterrupted; // 标识进度条是否被隐藏，即线程是否被销毁
// 通过new的方式直接创建ProgressDialog
final ProgressDialog progressDialog2 = new ProgressDialog(context);
progressDialog2.setIcon(R.mipmap.ic_launcher);
progressDialog2.setTitle("正在下载文件......");
// 设置进度条的样式（这里是横向的进度条）
progressDialog2.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
// 设置最大进度
progressDialog2.setMax(100);
// 当进度对话框正在加载数据的时候，如果点击对话框外围，不隐藏对话框
progressDialog2.setCanceledOnTouchOutside(false);
// 新建线程加载进度
final Thread loadThread = new Thread(new Runnable() {
    @Override
    public void run() {
        int progress = 0;
        while (++progress <= 100) {
            if (!isThreadInterrupted) {
                progressDialog2.incrementProgressBy(1);
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
        if (!isThreadInterrupted) {
            // 进度加载完成后隐藏对话框，同时弹出Toast
            context.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    progressDialog2.dismiss();
                    Toast.makeText(context, "文件下载完成！", Toast.LENGTH_SHORT).show();
                }
            });
        } else {
            // 重置，下次点击ListView的这个Item时可以重新开启线程下载
            isThreadInterrupted = false;
        }
    }
});
loadThread.start();
// 设置一个按钮，第一个参数是指定这个按钮的作用（Positive/Negative/Neutual）
progressDialog2.setButton(ProgressDialog.BUTTON_NEGATIVE, "取消下载", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        dialog.dismiss();
        // 点击取消下载按钮后阻塞下载线程
        isThreadInterrupted = true;
    }
});
// 显示对话框
progressDialog2.show();

效果：

4、圆形进度条对话框

代码：

// 如果不指定Dialog类的ProgressStyle，则默认显示一个圆形的进度框
final ProgressDialog progressDialog6 = new ProgressDialog(context);
progressDialog6.setMessage("正在加载......");
progressDialog6.setCanceledOnTouchOutside(false);
progressDialog6.show();
// 进度条三秒后消失，同时弹出Toast
new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        context.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                progressDialog6.dismiss();
                Toast.makeText(context, "加载完成！", Toast.LENGTH_SHORT).show();
            }
        });
    }
}, 3000);

效果：

5、单选列表对话框

代码：

final String[] items = {"苹果", "桃子", "梨", "李子", "香蕉", "橘子"};
final AlertDialog.Builder builder3 = new AlertDialog.Builder(context);
builder3.setIcon(R.mipmap.ic_launcher);
builder3.setTitle("选择你喜欢的水果");
// 设置单选选项，默认选中第一个，并绑定点击事件
builder3.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(context, "你最喜欢的水果是" + items[which] + "！", Toast.LENGTH_SHORT).show();
        // 选中某一项后关闭对话框
        dialog.dismiss();
    }
});
builder3.create().show();

效果：

6、多选列表对话框

代码：

final String[] items = {"苹果", "桃子", "梨", "李子", "香蕉", "橘子"};
final boolean[] checkState = {false, false, false, false, false, false};
final AlertDialog.Builder builder4 = new AlertDialog.Builder(context);
builder4.setIcon(R.mipmap.ic_launcher);
builder4.setTitle("选择你喜欢的水果");
// 设置多选选项，并绑定点击事件
builder4.setMultiChoiceItems(items, new boolean[]{false, false, false, false, false, false},
        new DialogInterface.OnMultiChoiceClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which, boolean isChecked) {
        checkState[which] = isChecked;
    }
});
// 点击“确定”按钮后输出选中的选项
builder4.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        String message = "";
        boolean first = true;
        for (int i = 0; i < items.length; i++) {
            if (checkState[i]) {
                if (first) {
                    message += items[i];
                    first = false;
                } else {
                    message += "、" + items[i];
                }
            }
        }
        if ("".equals(message)) {
            message = "看来您不喜欢吃水果";
        }
        Toast.makeText(context, "您喜欢的水果有：" + message, Toast.LENGTH_SHORT).show();
    }
});
builder4.setNegativeButton("取消", null);
builder4.create().show();

效果：

7、日期选择对话框

代码：

// 获取当前的年月日
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
// 创建DatePickerDialog
DatePickerDialog datePickerDialog = new DatePickerDialog(context, new DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
        // 得到的月份会比实际月份少1
        Toast.makeText(context, year + "-" + (month + 1) + "-" + dayOfMonth, Toast.LENGTH_SHORT).show();
    }
}, year, month, dayOfMonth);
// 显示对话框
datePickerDialog.show();

效果：

8、事件选择对话框

代码：

// 获取当前时间（时、分）
Calendar calendar = Calendar.getInstance();
int hourOfDay = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
// 初始化TimePickerDialoy，最后一个参数决定是否是24小时制
TimePickerDialog timePickerDialog = new TimePickerDialog(context, new TimePickerDialog.OnTimeSetListener() {
    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        Toast.makeText(context, hourOfDay + ":" + minute, Toast.LENGTH_SHORT).show();
    }
}, hourOfDay, minute, true);
// 显示对话框
timePickerDialog.show();

效果：

9、自定义对话框

代码：

final AlertDialog.Builder builder5 = new AlertDialog.Builder(context);
builder5.setIcon(R.mipmap.ic_launcher);
builder5.setTitle("自定义对话框");
// 使用LayoutInflater创建一个自定义布局
View customView = LayoutInflater.from(context).inflate(R.layout.dialog_custom, null);
final TextView tvName = (TextView) customView.findViewById(R.id.id_customdialog_username);
final TextView tvPassword = (TextView) customView.findViewById(R.id.id_customdialog_password);
// 为对话框设置自定义布局
builder5.setView(customView);
builder5.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        String username = tvName.getEditableText().toString().trim();
        String password = tvPassword.getEditableText().toString().trim();
        Toast.makeText(context, "您的用户名是" + username + "，密码是" + password, Toast.LENGTH_SHORT).show();
    }
});
builder5.setNegativeButton("取消", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        dialog.dismiss();
    }
});
builder5.create().show();

自定义对话框的布局dialog_custom.xml中的代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingBottom="15.0dip"
    android:paddingLeft="20.0dip"
    android:paddingRight="20.0dip"
    android:paddingTop="10.0dip">

    <EditText
        android:id="@+id/id_customdialog_username"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Input your name"
        android:inputType="text" />

    <EditText
        android:id="@+id/id_customdialog_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Input your password"
        android:inputType="textPassword" />

</LinearLayout>

效果：